No, eukaryotic cells do not have restriction endonucleases. This is because the DNA of eukaryotes is highly methylated by a modification enzyme, called methylase. Methylation protects the DNA from the activity of restriction enzymes .These enzymes are present in prokaryotic cells where they help prevent the invasion of DNA by virus.

520 Views

Switch

Flag

Bookmark

From what you have learnt, can you tell whether enzymes are bigger or DNA is bigger in molecular size. How did you know ?

DNA molecules are bigger in size as compared to enzymes. Enzymes are proteins which are synthesized from a small portion of DNA called genes therefore they are smaller than DNA molecules.